Ventilator



F. C. LARGEN.

vENTlLAToR.

APPLICATION FILED FEB. 7, 1920.

Patented July 5, 1921.

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5 @M mm3. maw@ F. C. LARGEN.

VENTILATOH.

APPLcAnoN FILED rs.7,192o. 1,388,469. Patented July 5,1921.

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Z5' za 12 57 724 wma/tp UNITED sTATEs PATENT OFFICE.

FRED C. LARG-EN, 0F CREIG-HTON, NEBRASKA.

Be it known that I FRED C. LARGEN, a citizen of the United States, and aresident of Creighton, in the county of Knox and State of Nebraska, haveinvented new and useful Improvements in Ventilators, of which the'following is a specification.

This invention relates to ventilators and refers more particularly tomeans for ventilating auditoriums, theaters, and the like places wherelarge numbers of peoplemay1 be congregated.-

The primary object of this invention is the provision of means forsecuring a more efficient and thorough change of air` in places in whicha large number of people are congregated.

A further object of the invention is the provision of means forautomatically directing an air current in any one of several elevations,as desired.

A still further object of the invention is to provide a Ventilatingsystem for auditoriums and the like which is associated with meanscontrolled by the .blower of the ventilator for introducing an aircurrent in any. one of several elevations.

A still further object of this invention is to provide a Ventilatingdevice whereby upon variations in speed of the blower the dlrection ofair current lis synchronously varied.

`A still further object of the invention is to provide means associatedand connected with a blower of the ventilator constituting a noiseeliminating element. Other objects and advanta s ofthe invention will beapparent during4 the course of the following description taken inconnection with the accompanying drawings.

In the drawings, forming a part of this specification andwherein likenumerals are employed to designate like parts throughout the same,

.Figure 1 is a side elevation' of the device in operation,

v Fig. 2 is a cross device, l Fig. 3 is a cross sectional viewof thedevice taken on line 3-'3 of Fi 2, l

- Figi 4 is a top plan view o a portion of the device showing thesociated therewith, and,

sectional view of the governing means as-A Patented July 5, 1921.

Y vnir'rrriacroizh 1,383,469, Specification of Letters Patent.

Application .filed February 7, 1920. Serial No. 356,874. To all lwhom2f/may camera:

Fig. 5 is a view partly in section of the shutter control means.

In the drawings, wherein for the purpose of illustration is shown apreferred form' of my invention, the numeral 1 designates the blower orfan casing which is formed of sheet metal, wood or any suitablematerial. This casing 1 is provided in each side thereof with relativelylarge oppositely disposed openlngs 2 for the admission of air to theinterior of the casing. The casing 1 is provided with an open end or airoutlet 1 to be hereinafter described. The casing is supported byupstanding support members 3 secured to a'base 4 of suitable constructieon which is also mounted a motor 5. l

A revoluble blower fan 6 is mounted within casing 1, the driving shaft 7of which is supported by journals 8 secured to cross bars 9whichfextendacross and are secured to'uprights 3. As shown clearly in Fig. 3 thedriving shaft 7 extends beyond the cas ing l and has mounted thereon atone end,

a driving wheel 10 which is rotated by means of an endless belt 1 1connected to the` motor 5. Secured to the opposite end of shaft 7 is agovernor l2 of ordinary construction. The shaft 7 is provided exteriorlyof the case 1 with collars 13 and 14 for the purpose of limiting thelateral movement of governor l2.

The fan or blower is of peculiar construction and as shown in Fig. 3comprisestw oppositely disposed substantially circular sides 15 eachvprovided with a relativel large opening 15 -which coincides in size witthe openings 2 above mentioned and are disposed adjacent thereto. Thesides 15 are connected by a plurality of blades 16 formed. preferably ofwood, sheet metal or other suitable material. As shown in Fig. 2 theiplates 16.,are tapered in thickness, having the narrower' edge towardthe center and. the thicker edge near the'k circumference of the blower,that is, the plates taper toward thencenter of the blower. These platesare secured against displacement by bolts or screws v'(not' shown) or bycleats 17 secured to the' sides of the blower between which the platesare mounted. The blower is supported withinthe casing 1 by means ofcross bars'18 secured to the sides of the'blower Y and at approximatelyright-angles with each ing the shutters 24, is provided with anarmother, to which is secured a collar 19 which is also secured todriving shaft 7. Secured around opening 41 of the casing by any suitablemeans such as a band 20` is a flexible air tube 21 formed ofcanvas,heavy cloth, or the like. The forward end of the iexible air tube2l is secured' to a cylindrical nozzle 22 by means of a band or othersuitable securing means 23.. The cylindrical nozzle 22 has communicationwith the air in the 27 which is 'secured to the above mentioned rod 25.v

As shown in Fig. 4, one of the shutter supporting shafts 26 is extendedfor a short distance and has mounted thereon a depending lever arm 30.'Secured to cross bar 9 is a bracket 28 on which is pivotally mounted anangle arm 29. One portion of angle arm 29 is bifurcated at its end andis positioned around shaft 7 as shown at 31, the other eX- tremity ofvarm 29 being connected to lever arm 30 -by means of connecting rod 32.

As shown inl Fig. 2 the shutters 24 lie with avery slight upwardinclination when the blower fan is not in operation the various elementsassociated therewith being so connected. As shownin Fig. 1 the entlredevice is positioned' exteriorly of theauditorium proper, beingpositioned in a compartment having aroof 33 and the sides34, one ofwhich is rovided with a plurality of shutf' the admission of air to thecompartment It is obvious, however, that the entire device maybearranged entirely sepa-l ratev from the auditorium or theater or at some'distance therefrom according to the length of flexible air tube 21.

into the vauditorium or,` the' theater.-

' ,It is believed that the construction'of the device will be readilyunderstood from theA accompanying-drawings as above describedv and theprimary object is to have the parts so positioned that upon an mcreaseof speed of the fan or blower there .will be a correspending increase inelevation ofthe shutters 24thereby allowinga'correspondin in'-l creasein elevation ofthe air current blown t is well known that in present.day systems of f ventilation the air current is usually blown .at oneelevation, no matterwhat the speed ofl the blower. This is injurious aswell alsvery uncomfortable to the assemblage of,- people `in theauditorium, My deviceJ eliminates this inconvenience byproviding asynchronous elevation of the air current-with `the increase of `speedofthe blower. It is to be understood that the form of m inventionherewith shown and described is to be taken as a preferred example ofthe same, andv that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of theinvention or the scope of the Subj oined claims. v

Having thus described my invention, what I claim as new and desire tosecure and rotect byvLetters Patent of the United tates is:

1. A ventilator for auditoriums and the like comprising a casing, a fanrotatably mounted within the casing, means for rotating said fan, an airconduit connected to the casing, a plurality of shutters mounted linsaid conduit, and means connected to the fan and to the'shutters forobtaining changes in position' of the shutters upon variations in -thespeed of rotation of the fan to deflect air at different-elevations withrespect to the conduit. y

2. A. ventilator for auditoriums and the like comprising a casing, arotatablel fan mounted within the casing, a flexible air conduit securedto and communicating with the casing and having an outlet, a pluralityof shutters secured within said air conduit, and means connected to thefan and the shutters for obtaining changes in position of the shuttersupon variations in speed of the fan to deiect air passing from theconduit at an langle with respect to its outlet.

3. The combination with a casing and a blower mounted therein, ofa`plurality of pivoted shutters in theA casing movable parallel to eachother, and mechanism operated by the blower to move the shutters to anangular position with respect to the longitudinal axis of the casing todeflect the air A at an angle with respect to the longitudinal axisofthe casing upon air forced from the casing above a predeterminedvelocity.

' 4.. In vcombination with a ventilator for .auditoriumsand the likecomprising a casing, a rotatableB fansecured within the caslng, an airconduit secured to and communil eating with the casing 'and a pluralityof shutters-'secured within said air conduit, means secured-to the fanand to the shutters for obtaining a synchronous elevation of the aircurrentexpelled from the air conduit upon an increase of speed of thefan.

- 5. A-Aventilator for auditoriums and. the likel comprising a casing, afan'provided with a pluralityof blades rotatably mounted l 'andcommunicating with the auditorium to be ventilated, a plurality ofshutters securedA Within said nozzle, and means the shutters andcoperating connected to with the fan for obtaining synchronous changesin position of said shutters upon variations in speed 5 of rotation ofthe fan to deflect the air expelled from the nozzle at an angle thereto.

6'. The combination with a casing having an outlet and a rotatableblower mounted therein, of a plurality of shutters pivoted in the casingto swing about horizontal axes and operatively connected together, andmechanism for tilting the shutters upon change of speed of the blowerwhereby to deflect the air from the casing at different elevations.

FRED C. LARGEN.

